3320221221 has 24 divisors (see below), whose sum is σ = 4928077440. Its totient is φ = 2152898496.

The previous prime is 3320221217. The next prime is 3320221231. The reversal of 3320221221 is 1221220233.

3320221221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3320221221 - 2² = 3320221217 is a prime.

It is a super-2 number, since 2×3320221221² = 22047737912757461682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3320221194 and 3320221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3320221231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74545 + ... + 110441.

It is an arithmetic number, because the mean of its divisors is an integer number (205336560).

Almost surely, 2^3320221221 is an apocalyptic number.

It is an amenable number.

3320221221 is a deficient number, since it is larger than the sum of its proper divisors (1607856219).

3320221221 is a wasteful number, since it uses less digits than its factorization.

3320221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36185 (or 36182 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3320221221 is about 57621.3608048265. The cubic root of 3320221221 is about 1491.8403188879.

Adding to 3320221221 its reverse (1221220233), we get a palindrome (4541441454).

The spelling of 3320221221 in words is "three billion, three hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".